Your internet guide to
all things catfish

Image
contributors to this species:

ScotCat
Sources:

Other
Sources:

Relevant Information:

The genus is recognized to be
paraphyletic. The species of Ompok have been grouped
into species groups, such as the Ompok bimaculatus
group (ie. O. bimaculatus,
O. malabaricus, O. miostomus, O. siluroides),
the O. eugeneiatus group (ie. O. eugeneiatus,
O. pinnatus), the O. hypophthalmus group (ie.
O. hypopthalmus, O. rhabdinurus, O. urbaini), and
the O. leiacanthus group (O. fumidus, O.
jaynei, O. leiacanthus). On the other hand, the monophyly
of these species groups is not strong enough to reassign species
to other genera. The O.eugeneiatus group is likely
to be more closely related to Kryptopterus than the
other Ompok species. According to the recent catfish
checklist, O.eugeneiatus has been reclassified into
Kryptopterus, however O. pinnatus has not.
Dorsal soft rays (total): 4; Anal soft rays: 54 - 74. Two
pairs of barbels; maxillary barbels reaching pelvic fins or
anal fins; mandibulary barbels minute, about as long as diameter
of eye. Eyes small, covered by skin. Dorsal and pelvic fins
small; anal fin long; pectoral fins well developed vomerine
teeth in 2 patches. Brown, usually marmorated body with conspicuous
round black blotch above pectoral base and a smaller sometimes
indistinct spot at the caudal peduncle. Occurs in streams
and rivers of all sizes with currents ranging from sluggish
to moderate. Moves into freshly inundated habitats during
the flood season and feeds on crustaceans and mollusks. Remarks:
This species was at one time a synomyn for O. bimaculatus
but this species has a silver body.

Common
Name:

None

Synonyms:

Phalacronotus siluroides,
Wallago krattensis, Ompok krattensis.

Family:

Siluridaeycipitidae

Distribution:

Asia: Mekong
and Chao Phraya River drainages in Indochina, the Malay Peninsula,
the Barito River drainage in southern Borneo and Java.